Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
  • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
  • B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
  • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
  • B32B2309/08—Dimensions, e.g. volume
  • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
  • B32B2309/105—Thickness
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
  • Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31678—Of metal
  • Y10T428/31692—Next to addition polymer from unsaturated monomers
  • Y10T428/31696—Including polyene monomers [e.g., butadiene, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31678—Of metal
  • Y10T428/31692—Next to addition polymer from unsaturated monomers
  • Y10T428/31699—Ester, halide or nitrile of addition polymer
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31826—Of natural rubber
  • Y10T428/31841—Next to cellulosic
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/3188—Next to cellulosic
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers
  • Y10T428/31931—Polyene monomer-containing

Definitions

• the present invention relates to extruded AES film and the use of said film as a surface layer in laminates.
• the AES graft copolymer composition employed in the invention is described in U.S. patent 4,202,948, Peascoe, May 13, 1980 and is ordinarily based on a graft copolymer of resin-forming monomeric material (especially such monomers as vinyl aromatics, alkenoic nitriles, esters, or acids, or mixtures thereof, e.g., a mixture of styrene and acrylonitrile) on an olefin copolymer rubber spine, whether a saturated ethylene-propylene rubber (EPM) or an unsaturated terpolymer (EPDM) containing a suitable diene, especially a non-conjugated diene, as in rubbery terpolymers of ethylene, propylene, and dicyclopentadiene, ethylidene norbornene, hexadiene, or the like.
• resin-forming monomeric material especially such monomers as vinyl aromatics, alkenoic nitriles
• graft copolymer In the preparation of such a graft copolymer, much of the resin-forming monomers become chemically grafted to the rubbery spine, but a certain amount of ungrafted resin is also formed (i.e., grafting efficiency is not 100%).
• additional separately prepared resin is blended with the product of the graft polymerization step.
• SAN styrene-acrylonitrile resin
• SAN styrene-acrylonitrile resin
• AES compositions are useful as they combine high impact strength, rigidity, and weatherability.
• Articles of all sorts may be made by injection molding, profile extrusion or sheet extrusion. These major process operations may also be followed by other operations such as trimming, cutting, painting, thermoforming, fastening, welding, etc., to produce the finished article.
• AES is extruded as an integral material or coextruded over one or both sides of a less weatherable material such as ABS (acrylonitrile-butadiene-styrene).
• ABS acrylonitrile-butadiene-styrene
• the AES layer or layers provide a protective screen to prevent or delay degradation of the substrate from the harmful effects of outdoor exposure, especially sunlight.
• This protective layer is most effective in screening out sunlight when it is pigmented.
• the level of pigment and thickness of the AES layer that will provide adequate protection of the substrate must be determined on a case-by-case basis and will depend upon the type of pigment used, type of substrate, expected severity of sunlight exposure and desired lifetime of the product.
• the degree to which the AES protective layer will be "drawn down" (made thinner) during thermoforming of the sheet into a particular article must also be taken into account. In general terms, however, the higher the pigment loading in the cap layer or layers, the more effective will be the screening effect.
• the invention is directed to an extruded AES film in which the AES contains 15-30% rubber having a thickness of from 1 to 10 mils, especially such an extruded AES film containing 2 to 20 parts of pigment per 100 parts of AES.
• the invention further relates to a laminate having on at least one surface a layer of extruded AES film in which the AES contains 15-30% rubber, said extruded film having a thickness of from 1 to 10 mils.
• the other layer of the laminate may comprise any of a variety of materials such as, for example:
• an extruded AES film having a rubber content within the range of from 15-30% (typically EPM or EPDM) based on the total weight of rubber plus resin (including both resin formed in situ and any added separately prepared styrene-acrylonitrile resin or the like).
• a rubber content within the range of from 15-30% (typically EPM or EPDM) based on the total weight of rubber plus resin (including both resin formed in situ and any added separately prepared styrene-acrylonitrile resin or the like).
• a rubber content typically from 18 to 28%.
• sheet is defined (page 52C) as a flat section of a thermoplastic resin with the length considerably greater than the width and 10 mils or greater in thickness.
• Film is defined (page 43) as an optional term for sheet having a nominal thickness not greater than 0.010 inches. The present invention is concerned with film.
• AES For purposes of the invention AES, one to ten mils thick, can be extruded using flat film dies or blown flim equipment.
• the preferred technique is the blown film method which involves extrusion of the AES through a circular die and expansion of a resulting "bubble" by air admitted through a central mandrel.
• the bubble is subsequently collapsed by a plate assembly and a nip roll seals in a uniform volume of air in the bubble.
• An air ring is utilized for cooling and freezing off the perimeter of the bubble after it exits from the die and expands to its finished diameter.
• the blow up ratio final bubble diameter divided by the die orifice diameter
• the use of a collapser assembly designed for rigid film is recommended to prevent crinkling and folding of the flim.
• Film gage uniformity can be improved by using a rotating die.
• the finished AES sheet can be rolled as a tube or slit and rolled as a flat sheet (film).
• the two major advantages of the blown film process are the biaxial orientation of the flim and the lack of taper at the film edge.
• the extruded film of the invention is normally laminated onto one or both sides of a less weatherable material.
• the extruded pigmented laminated film serves as a screen to protect the less weatherable substrate from the harmful effects of sunlight, moisture, etc.
• the quantity of pigment present in the extruded film of the invention is not critical but normally falls within the range of from 2 parts or less to 20 parts or more, per 100 parts by weight of the AES.
• Any suitable conventional pigment may be used.
• An important consideration in choosing pigments for outdoor use is lightfastness. Inorganic pigments tend to be more lightfast than organic pigments although many organic pigments are sufficiently lightfast for outdoor use.
• suitable pigments are titanium dioxide pigments such as Unitane OR-450 (trademark), iron oxide pigments such as Pure Red Iron Oxide R1299 (trademark), carbon black such as Black Pearls 900 (trademark) and Irgazin Red BPT (trademark). Ordinarily up to 20 parts by weight of pigment is used, per 100 parts by weight of AES.
• the AES employed in the invention is preferably prepared by blending two separate components, namely :
• the preferred graft copolymer (A) is prepared by graft copolymerizing (a) styrene and acrylonitrile in weight ratio of 80/20 to 65/35 on (b) a rubber terpolymer of ethylene, propylene and dicyclopentadiene in which the weight ratio of ethylene to propylene is within the range of from 80/20 to 20/80.
• the Mooney viscosity of the terpolymer rubber (b) is preferably from 30 to 90 ML-4 at 257°F and the iodine number of the rubber (b) preferably is from 10 to 50.
• the amount of (a) acrylonitrile/styrene is about 50% based on the weight of (a) plus (b).
• the preferred separately prepared resin (B) is a copolymer of styrene and acrylonitrile in weight ratio of 80/20 to 65/35 having an intrinsic viscosity in dimethylformamide at 30°C of at least 0.4.
• the amount of resin (B) in the AES is sufficient to provide an over-all ratio of resin to rubber in the range of from 85/15 to 70/30.
• an antioxidant is present during the graft copolymerization stage.
• Component A (the graft copolymer) and component B (the separately prepared resin), are sheared or masticated together at elevated (fluxing) temperature, for example in a twin screw type of extruder-blender, or batch mixer such as a Banbury mixer.
• Other ingredients such as UV stabilizers and pigments may also be added at this stage.
• the finished article is usually a flat sheet or shallow drawn part where there is little or no thinning of the film.
• appearance retention rather than impact strength becomes the dominant requirement of the film.
• typically thinner and lower rubber content (harder surface) films can be used when the substrate is non-plastic.
• thin film extrusion particularly blown film extrusion provides a higher quality and less costly film than calendering.
• a particularly valuable form of the invention comprises an AES capped metal sheet for use as side wall panels in the commercial building and construction industry.
• AES/metal construction can be used in place of a variety of siding materials including painted steel or aluminum, acrylic film laminated steel, aluminum and aluminum/zinc alloy coated steel and stainless steel.
• Another valuable embodiment of the invention comprises an AES film laminated to a cellulosic base, particularly a wood base.
• a suitable thin AES film for use in the invention may be made by various extrusion processes, it is preferred that the film be prepared by the blown film process (in which the film is extruded as a tube which is blown, flattened and slit--see Modern Plastics Encyclopedia 1981-1982, page 290).
• the thickness of film suitable for use in the invention is from 1 to 10 mils, preferably 2 to 5 mils.
• the extruded AES film may be applied to the substrate in any suitable conventional manner, continuously if desired. If the AES and the substrate are not inherently mutually adhesive, a suitable material may be applied to the AES film or the substrate prior to or simultaneously with the laminating step. Elevated temperature and pressure may be used to assist the lamination.
• Film having a thickness of about 4 mils is produced by the extruded blown film process.
• Steel sheet having a thickness of 10 mils treated with a phosphite rust inhibitor is coated with a conventional adhesive composition such as a heat-sensitive polyurethane; the adhesive coating is allowed to dry.
• a conventional adhesive composition such as a heat-sensitive polyurethane
• the AES film is pressed to the adhesive-coated metal at a temperature of 425°F for two minutes.
• Adhesion is tested initially on a flat stock and after one hour in boiling water on a dimpled panel.
• the dimple is formed by pressing a one inch steel sphere into the back of the panel.
• To test the adhesion the dimple is scored with a sharp knife and a pressure-sensitive adhesive tape is applied and removed. The AES film does not pull off, indicating that the adhesion is entirely satisfactory.

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• Laminated Bodies (AREA)

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• 1982
  • 1982-08-09 US US06/406,581 patent/US4444841A/en not_active Expired - Fee Related
• 1983
  • 1983-07-25 EP EP83304276A patent/EP0101215A3/de not_active Withdrawn
  • 1983-07-29 BR BR8304089A patent/BR8304089A/pt unknown
  • 1983-08-09 JP JP58145610A patent/JPS5949968A/ja active Pending

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